BDFHYK SP546 Iridium Spark Plugs, 8-Pack, Ford 5.4L V8

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Product guide

BDFHYK SP546 Iridium Spark Plugs, 8-Pack, Ford 5.4L V8

BDFHYK SP546 iridium spark plugs are listed as an 8-pack for the 2004–2008 Ford F-150 with a 5.4L V8. The listing also names other Ford and Lincoln applications, so confirm your vehicle’s year, engine and replacement-part number before ordering.

At a glance

Iridium center electrodes and ceramic insulators are claimed by the manufacturer.
The listing names a range of Ford and Lincoln applications, with fitment varying by vehicle and engine.
Manufacturer claims an economic service life of 30000-40000 kilometers.

Price

$42.28Save 10%

Reference price: ~~$46.99~~

Price checked: Nov 13, 2026

View offer

Often bought together

Marsram Ignition Coil Pack FD508 for 2005-2008 Ford F150 Expedition 5.4L V8 | Fit for 2004 2005 2006 2007 2008 Ford F250 F350 Super Duty Mustang Lincoln Navigator 5.4L, 2006-2008 Explorer 4.6L DG511 8Pcs

$41.99

Pros and cons

Pros

Eight plugs are listed, suitable for buyers replacing a full set on an eight-cylinder engine when fitment is confirmed.
The listing supplies OE reference numbers SP515 and SP546 for cross-checking.

Technical specifications

11 specifications

Identity
Brand	BDFHYK
Model	BD-05-01875-SP
Spark plug type	Iridium Spark Plug
Core material	Iridium
Top material	Ceramic
Thread size	14

Fitment and references
Vehicle service type	Truck
Automotive fit type	Vehicle Specific Fit
OEM equivalent part number	SP515, SP546

Manufacturer claims
Claimed service life	Economic service life of 30000-40000 kilometers
Warranty description	1 year warranty

What to know before buying

Listing details to confirm

Fitment is vehicle- and engine-specific. Verify the year, make, model, engine and OE number against your vehicle before purchase. The listing's compatibility claims span different models and engines, so do not assume all listed applications use the same fitment.

What’s in the box

Included

Housing

Who is it for?

A good fit for

Owners confirming an applicable Ford or Lincoln vehicle and matching OE number.
Buyers seeking an iridium-plug set for a vehicle that requires eight plugs.

Less suited to

Buyers who cannot verify their vehicle’s engine and OE plug reference before ordering.
Vehicles outside the specifically confirmed fitment for this part.

BDFHYK SP546 Iridium Spark Plugs, 8-Pack, Ford 5.4L V8 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 2,112 ratings

5 stars78%78%
4 stars10%10%
3 stars5%5%
2 stars1%1%
1 star6%6%

Customer feedback is generally favorable on performance, fit, smooth operation, installation and value, but durability reports are mixed, including a report of plugs breaking after a few hundred miles. Feedback on pre-gapping is also mixed. Because fit is application-specific and the listing provides no gap measurement, buyers should verify fitment and gap for their engine and inspect the plugs before installation.

Positive themes

Customers report good performance, fit and smooth operation, with some also describing installation as easy and value as favorable.

Negative themes

Some customers report that plugs broke after a few hundred miles.

Mixed feedback

Customer reports differ on whether the plugs arrive correctly pre-gapped.
Durability feedback is mixed, with some saying the plugs continued working and others reporting breakage.

Frequently asked questions

Will these fit my Ford F-150?

The title lists the 2004–2008 F-150 with a 5.4L V8. Confirm your vehicle’s year, engine and OE plug number before buying.

How many plugs are included?

The listing describes an 8-pack.

What is the claimed service life?

The manufacturer claims an economic service life of 30000-40000 kilometers. This is a listing claim, not an independently verified lifespan.

Are the plugs pre-gapped?

The supplied listing information does not confirm a gap specification. Customer feedback on pre-gapping is mixed, so inspect and verify the gap against your vehicle’s requirements.